All categories

3 years ago

A train has an initial velocity of 44m/s and an accelaration of _4m/s calculate its velocity

Physics

1 answer:

Kobotan [32]3 years ago

7 0

Complete question:

A train has an initial velocity of 44m/s and an acceleration of -4m/s². calculate its velocity after 10s ?

Answer:

the final velocity of the train is 4 m/s.

Explanation:

Given;

initial velocity of the train, u = 44 m/s

acceleration of the train, a = -4m/s² (the negative sign shows that the train is decelerating)

time of motion, t = 10 s

let the final velocity of the train = v

The final velocity of the train is calculated using the following kinematic equation;

v = u + at

v = 44 + (-4 x 10)

v = 44 - 40

v = 4 m/s

Therefore, the final velocity of the train is 4 m/s.

You might be interested in

Kendra is a psychology student. She reads a case study about a man with schizophrenia whose symptoms include laughing for reason

soldier1979 [14.2K]

She presents symptoms of <u>disorganized schizophrenia</u> since her behavior is chaotic and is not organized around themes that are maintained over time.

<h2>What is disorganized schizophrenia?</h2>

Disorganized schizophrenia is the disease expressed through hallucinations and delusions, among the negative symptoms we find cognitive, behavioral and emotional deficits of different types.

<h3>Symptoms of disorganized schizophrenia</h3>

The person shows disorganization in his emotional states, in what he says and / or in his way of moving.

The person presents language disorganization that affects thinking and cognitive processes.

Therefore, we can conclude that the presence of inappropriate emotional expressions, disorganized language, and motivational deficits are symptoms of disorganized schizophrenia.

Learn more about schizophrenia here: brainly.com/question/15401779

5 0

3 years ago

A 15.0 g bullet is moving to the right with speed 270 m/s when it hits a target and travels an additional 25.0 cm into the targe

Fantom [35]

Answer:

$F=2187\ N$

Explanation:

Given:

mass of bullet, $m=15\ g=0.015\ kg$

initial velocity of bullet, $u=270\ m.s^{-1}$

displacement of the bullet in the target, $s=25\ cm=0.25\ m$

Here as given in the question the bullet penetrates the target by the given displacement of the bullet into it. During this process it faces deceleration and hence it comes to rest.

so, final velocity of the bullet, $v=0\ m.s^{-1}$

Now using the equation of motion:

$v^2=u^2+2a.s$

where:

$a=$ acceleration of the bullet

$0^2=270^2+2a\times 0.25$

$a=145800\ m.s^{-2}$

<u>Now the force of resistance offered by the target in stopping it:</u>

$F=m.a$

$F=0.015\times145800$

$F=2187\ N$

5 0

3 years ago

~~~!Here's the question!~~~

gtnhenbr [62]

The answer would most likely be A since obviously gravity weighs things down which helps the every other masses stay settled in place

6 0

3 years ago

Read 2 more answers

Two fishing boats depart a harbor at the same time, one traveling east, the other south. the eastbound boat travels at a speed 3

kaheart [24]

1) Let's call $V_S$ the speed of the southbound boat, and $V_E=V_s+3~mph$ the speed of the eastbound boat, which is 3 mph faster than the southbound boat. We can write the law of motion for the two boats:
$S_E(t)=V_E t=(V_S+3)t$
$S_S(t)=V_S t$

2) After a time $t=3~h$ , the two boats are $45~mi$ apart. Using the laws of motion written at step 1, we can write the distance the two boats covered:
$S_E(3~h)=3(V_S+3)=3V_S+9$
$S_S(3~h)=3V_S$
The two boats travelled in perpendicular directions. Therefore, we can imagine the distance between them (45 mi) being the hypotenuse of a triangle, of which $S_E$ and $S_S$ are the two sides. Therefore, we can use Pythagorean theorem and write:
$45= \sqrt{(3V_S)^2+(3V_S+9)^2}$
Solving this, we find two solutions. Discarding the negative solution, we have $V_S=9~mph$ , which is the speed of the southbound boat.

4 0

3 years ago

30 POINTS PLZ HELP!!!

pishuonlain [190]

Answer: Option (A) is the correct answer.

Explanation:

Since Robert has a history of depression this means that he is mostly worried about his image in his family and friends because everyone wants to look good in everybody's eyes.

Similarly, Robert also wants to be treated fairly well by everyone around him as he wants that everybody consider him normal.

Thus, Robert’s apprehension to get help is an example of a fear of being stigmatized.

8 0

3 years ago

Read 2 more answers

A train has an initial velocity of 44m/s and an accelaration of _4m/s calculate its velocity​

A train has an initial velocity of 44m/s and an accelaration of _4m/s calculate its velocity